Load Sensing Function - VWR 3500 Manuel D'instruction

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PEratINg NStrUCtIONS dvaNCEd
b. Simultaneously press both the up and the down arrows, the display will indi-
cate zero (0:00). The unit time is now set to zero (0:00) minutes. Alternately,
you can use the up/down arrows to get to zero (0:00).
c. Press the on/off button below the time display. The display will indicate accu-
mulated time. The up/down arrows will become inactive. To stop timer, press
the on/off button again. IMPOrtaNt: This will NOt interrupt the shaking func-
tion. Press the on/off button below the speed display to interrupt the shaking func-
tion.
d. To reset, press and hold the on/off button below the time display. After three (3)
seconds the display will indicate the previous set time, which was zero (0:00).
4. Setting timed mode: Programmed time.
a. Press the up/down arrows below the time display until you reach the desired
time.
b. Start this function by pressing the on/off button below the time display. The unit
will run for the selected time, the up/down arrows will become inactive while the
timer is running. The unit will stop shaking when time display reaches zero
(0:00). Four (4) audible beeps will indicate the count down function is complete.
The time display will default back to the set time. To repeat for the same time,
simply depress the on/off button again.
c. To interrupt an automatic timing cycle before it is completed, press the on/off
button below the time display. The display will flash off and on to indicate the
time function is on "hold".
IMPOrtaNt: This will NOt interrupt the shaking function. Press the on/off button
below the speed display to interrupt the shaking function. Restart the timer by
pressing the on/off button below the time display. Unit will continue counting down
to zero (0:00). When the display reaches zero (0:00), you will hear the four (4)
audible beeps that indicate the count down function is complete and the shaking
function will cease.
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rbItal HaKEr
CONt d
5. turning unit off:
a. To turn the unit off, press the standby button. The speed and time displays will
be blank, the standby indicator light will illuminate. The Orbital Shaker should
be kept in standby mode when not in use. To completely cut off power to the
unit, disconnect the power cord from the unit or unplug from the wall outlet.

lOad SENSINg fUNCtION

The Advanced Orbital Shaker Models 3750 and up is equipped with a load sensing
function that can be activated by the user. This function provides protection against
improper positioning of load and maximum load being exceeded. When activated, the
unit will automatically sense improper load conditions and slow to a safe running
speed, then display that speed followed by E04 on the speed display. The unit will also
beep three (3) times every 60 seconds until the error is reset by pressing the speed
on/off button. To activate the load sensing function use the following steps:
1. Place the unit in standby mode.
2. Press and hold the speed on/off button and press the standby button. The unit will
beep two (2) times, confirming the function is enabled.
3. To restore normal operation, remove AC power to the unit for ten (10) seconds and
then restore. If the E04 error occurs be sure the load is within the maximum spec-
ification and properly balanced (centered on tray) and/or reduce sample
size/speed before restarting the unit. If the E04 occurs due to acceptable sample
vibration or another vibration source, the vibration sensing function can be dis-
abled as described above.
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